The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2006
Filed:
Mar. 14, 2002
Gary David Annis, Landenberg, PA (US);
Richard James Brown, Newark, DE (US);
Albert Loren Casalnuovo, Wilmington, DE (US);
Stephen Ernest Jacobson, Princeton, NJ (US);
Philip Osborne Moss, Wilmington, DE (US);
Gary David Annis, Landenberg, PA (US);
Richard James Brown, Newark, DE (US);
Albert Loren Casalnuovo, Wilmington, DE (US);
Stephen Ernest Jacobson, Princeton, NJ (US);
Philip Osborne Moss, Wilmington, DE (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The present invention pertains to methods for preparing a compound of Formula (I), wherein A is O or N-L; each L is independently H or an acyl group; K is, together with the two contiguous linking carbon atoms, a phenyl ring, a 5- or 6-membered heteroaromatic ring or an aromatic 8-, 9- or 10-membered fused carbobicyclic or heterobicyclic ring system wherein each ring or ring system is optionally substituted; Ris H, Cto Calkyl or COR; Ris H or Cto Calkyl; and Ris Cto Calkyl; comprising hydrogenating a compound of Formula (II), wherein n is 0, 1 or 2 in the presence of a catalyst comprising palladium to form the compound of Formula (I). This invention further pertains to methods for preparing compounds of Formula (II) useful for preparing compounds of Formula (I). This invention also pertains to compounds used in these methods